Listings for the BLP729 battery model name point mostly to the Realme C3, with a pack advertised at 5000 mAh typical. BLP is the code family used for Realme, Oppo and OnePlus batteries. If you searched "realme c3 battery model name", BLP729 is the code to look for, and the sections below show how to confirm it on your own phone.
Some buyers write it as "blp 729" with a gap between letters and digits. That is still the same pack. On a sealed Realme C3 the BLP729 marking hides under the rear panel, so only a technician with the back off can read it. A few listings also name other Realme phones for this code, such as the Realme C11. Those matches are not consistent, so treat the phone list as a guide and let the label in your hand decide.
Quick facts
Step by step
Write down the exact phone name and model number
Open Settings and tap About phone. Note the device name and the model number. If you cannot find it, type model in the Settings search bar.
Have the old battery label read
Once the back is open, look for
BLP729on the sticker, close to the capacity and voltage lines. Leave the pack in place and do not pull at the tape yourself.Compare the connector and the outline
Hold the new pack beside the old one. The outline, the thickness and the connector end should look the same. A different shape means a different pack, even if the capacity matches.
Judge the new pack before it goes in
Check that the print is sharp and a batch detail is present. Weigh both packs in your hands: a clearly lighter one with a bigger mAh claim is a poor sign.
Which phones use the BLP729 battery model name
Replacement listings for BLP729 point most often to the Realme C3. It is a budget phone with a large pack of about 5000 mAh. Other phone names appear in some listings, but they do not agree, so only the C3 is treated as the match here. The table shows how sure each match is.
| Phone | Match status | Note |
|---|---|---|
| Realme C3 | Matched by most listings | The phone most people search for with this code |
| Realme 5 and Realme 5i | Doubtful | Many listings give these a different code, close in number. See the BLP731 page and read the old sticker |
| Realme C11 | Doubtful | Listings disagree, and several Realme phones carry a C11 name. Check the sticker and model number |
| Realme 3 | Different phone | Not a BLP729 phone, see its own page |
For the Realme 5 on its own, open the Realme 5 battery page. For the whole family of codes, use the Oppo, Realme and OnePlus battery list.
Realme C3 or Realme 3: two phones, two packs
The search "realme c3 battery model" often lands on the wrong phone. The Realme C3 is an entry phone with a 5000 mAh class pack, which listings code BLP729. The Realme 3 is an older and differently built phone, and its pack is not a BLP729 pack. Open the Realme 3 battery page if that is the phone in your hand.
The same care applies to any Realme phone with a similar name. Several carry near-identical names with different model numbers. Check the model number under About phone and tell the technician both the number and the code.
A customer asked for a "C3 pack" and the counter staff took out a pack made for the Realme 3, since both names end in 3. The thickness looked right, but the connector sat at a different spot. Reading BLP729 off the old C3 cell, the technician swapped the wrong pack for the right one.
Rated and typical capacity of the BLP729 pack
The 5000 mAh figure is the typical capacity, which is the number used in adverts and part listings. Many Realme and Oppo packs also print a rated (minimum) figure on the sticker, which usually sits slightly under the advert number. Nobody has published the rated number for BLP729 in a source we could confirm, so copy it from your own sticker.
To compare energy, use watt hours: mAh x volts / 1000. Where the C3 label lists 3.87 V, its 5000 mAh cell works out near 19.4 Wh. Note the voltage on your sticker before comparing two packs, because equal mAh at unequal voltage stores unequal energy.
A bigger number does not always mean a better pack. A 5000 mAh cell is close to the limit for this body size. A copy that claims much more is not telling the truth about the cell.
Codes that get mixed up with BLP729
Realme and Oppo packs share the BLP prefix, and the three digits that follow are the only difference. A pack that is one or two digits off belongs to another phone. Look at these before accepting a pack at the counter:
- BLP727 is only two digits away. Read its own page for its phones.
- BLP731 is also close in number but is a separate pack. Several listings place it with the Realme 5 range.
- The Oppo A5 is a 5000 mAh class phone as well. Its code and phone match are on its own battery page, so do not assume it shares BLP729.
Never choose a pack by capacity alone. Two packs of the same mAh can differ in size and connector.
Signs the BLP729 battery is failing
| Symptom | Likely reason | Action |
|---|---|---|
| Charge level falls fast within minutes of use | Cell worn by many full cycles | Test its health, then budget for a new pack |
| Phone switches off while it still shows some charge | Tired cell sags in voltage under load | Have it tested by a technician |
| Back panel lifts or screen edge rises | Swollen cell | Unplug and get it looked at today |
| Phone is warm while idle | Faulty pack or a busy app | Restart, take off the cover, then have it examined |
A background app or weak signal can mimic a bad battery, so first read about a phone battery that drains fast. Then follow the battery health check to learn whether the pack is really worn.
A battery that bulges, runs hot, leaks or is dented must be unplugged immediately. Do not press it, bend it or poke it, and keep it away from heat. Cheap copies that claim an oversized capacity are widely sold, so fit only a pack whose printed code matches your old one.
Replacing the pack: a safe route
These phones are built with the back glued or clipped, so the swap is best done by the brand's service team or a technician who does it daily. Take the phone, the model number and, if possible, a photo of the old sticker. Ask the technician to match BLP729 against the label before the old pack is thrown away.
- Hold the new and old packs in each hand. A big gap in heft is a warning.
- Look for sharp print and a batch detail on the sticker.
- Be careful with any pack that offers far above 5000 mAh for this phone.
Fitting advice in more detail sits on the mobile battery replacement page.
Keep the old battery label photo in your gallery. When the next replacement is due, you will not need to open the phone just to learn the code.
Daily care for a big pack in an entry Realme
A large cell in an entry phone mostly ages through warmth and many hours parked at a full charge. Keep a charging C3 off quilts and sunny window ledges, and pull off a chunky case whenever the frame warms up. Prefer the original charger, or another of equal or lower rating, and swap out any cable that warms up near the plug.
If the phone keeps dying early even after you restart it and give it one complete charge, the cell is probably tired. Get the battery tested before you spend on a new one, because a software problem can look the same.
Frequently asked questions
Which phone uses the BLP729 battery model name?
Most listings match BLP729 to the Realme C3, sold as 5000 mAh typical. Some listings name other Realme phones, but they disagree. Confirm the code on your old sticker before you order.
What is the Realme C3 battery model name?
Most listings give the Realme C3 battery as BLP729. Your technician can verify this by looking at the printed code with the back panel off.
How many mAh is the BLP729 battery?
It is advertised at 5000 mAh typical. The rated figure on the label can be a bit under that, so read your own sticker.
Is BLP 729 the same as BLP729?
Yes. People type it with a space, but the code is written without one. Look for the same letters and digits on the battery label.
Can I use a Realme 3 battery in a Realme C3?
No. They are different phones with different packs, and the connector and size can differ. Match the exact code instead of the similar name.
How can I tell if a BLP729 battery is a fake?
Fakes tend to feel lighter than your old pack, show blurry print with no batch detail, and claim far more than 5000 mAh. Compare it with the old pack side by side before fitting.